package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.Mapper.CategoryMapper;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.entity.SetmealDish;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;
    @Override
    public void remove(Long id) {
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();


        //查询当前分类是否关联了菜品，如果关联就抛出一个业务异常
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,id);
        int count = dishService.count(dishLambdaQueryWrapper);
        if (count!=0){
            throw new CustomException("当前分类下关联了菜品，无法删除");
        }
        //查询当前分类是否关联了套餐，如果关联就抛出一个业务异常
        LambdaQueryWrapper<Setmeal> setmealServiceLambdaQueryWrapper = new LambdaQueryWrapper<>();
        setmealServiceLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        int count1 = setmealService.count();
        if (count1>0){
        throw new CustomException("当前套餐下关联了菜品，无法删除");
        }
        //正常删除
        super.removeById(id);
    }
}
